Stone-cutter&#39;s gage.



No. 740,079. PATBNTED SEPT. 29, 1903.

EBAUMANN. 4

STONE CUTTERS GAGE.

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UNITED HENRY i atented se tember 29, 1903.

BAUMANN, OF HOBOKEN, NEW JERSEY.

STON E-CUTT ERS GAG SPEGIFIGATION formingpart of Letters Patent No, 740,079, dated. September 29, 1903.

Application filed July 9, 1903. $erial No. 164,766. (No model.)

To all zbhom it may concern.-

Be it known that L-HENRY BAUMANN, a citizen of Germany, residing at Hoboken, Hud-' a front elevation of my improved stone-cutters gage; Fig. 2, a side elevation thereof,

partly in section; Fig. 3, a detail side view of the pointer; Fig. 4, an end view thereof, and Fig. 5 a detail plan of the tracer.

The lettera represents a wall or other upright support, and b is an outwardly-projecting stone embedded therein. The surface of this stone is to becut to conform to the surface of a smaller model or pattern 0, which is supported above the stone preferably upon an intervening foundation (1. To the wallet is secured,- centrally above stone b and model a, a bracket e, from which a lever f is suspended by a universal jointf. This lever carries a. slidable upper tubular bearing 9 for the tracer h and a slidable lower tubular bearing 2' for the pointer-j. The upper bearing 9 may be clamped to lever f by a set- It is provided with a sleeve 9 extending at right angles and adapted to receive the tracer h, which may be clamped thereto by a set-screw h. The lower bearingc' may be clamped to leverfby a set-screw 11. It is provided with a sleeve i extending at right angles therefrom and adaptedto receive an axially-rotatable pin 7c, which may be clamped in position by a set-screw 70. To the end of pin it is pivoted at k a U-shaped frame Z, the perforated shanks Z of which receives the longitudinally-adj ustable pointer j. A spring 1*, secured to frame 1 and bearing against pointer j, holds the latter in position. By means 1 of the construction destone.

scribed the distance between the end of the pointerand theleverf may be varied.

To the wall a there is attached a rule 111, the working edge of which when prolonged passes through the center of joint f. The rule m carries an upper scale m opposite model 0 and tracer g, and a lower scale m opposite stone b and pointer j. The scales m m? are so proportioned as to conform to the ratio of the designs on model and stone, so that if the model is to be three times enlarged the ratio of the scales is as one to three. From the rule 1% projects an arm m which constitutes a rest for lever f when the latter is swung aside.

The operation is as follows: The tracer g is placed opposite the point of the model to be copied andthen the lever f is swungaside, so that the position of the tracer is ascertained on scale m, the surface of the rule being touched by the point of the tracer. The pointerj is then set to a corresponding mark on scale m and is simultaneously drawnin or out until its point also contacts with the rule. The leveris now swung back so that the tracer arrives on the model opposite the point to be copied, while the pointer will bear against the corresponding point of the rough Thispoint is now cut away until the tracer contacts with the model, when the elevation on the stone at this point will be in' the required ratio to that on the model. After the operation is repeated for each point of the two-concentric arcs along which the tools are swept the latter are set to a new radius in the manner described, so that the entire surface of the stone is gaged by successive points of successive arches, the operation being continued until the entire surface of the stone has been traversed.

Of course the invention may be applied for gaging horizontal or inclined as well as vertical surfaces.

1. A stone-cutters gage provided with a lever, an upper bearing and a lower bearing adj ustably mounted thereon, a tracer secured to theupper bearing, a pointer, means for adjustably securing the pointer to the lower bearing, and a rule having two scales opposite the tracer and pointer respectively, Sllb- I stantially as specified.

2. A stone-cutters gage provided with a lever, a tracer and a pointer adjustably se-. cured thereto, a rule having two scales opposite the tracer and pointer respectively, 10 and a lever-rest on the rule, substantially as specified.

Signed by me at New York city, (Manhattan,) New York, this 8th day of July, 1903.

HENRY BAUMANN. Witnesses:

FRANK v. BRIESEN, WILLIAM ScHULz. 

